Have been using this for a month without any issues. Linked to my Ipad Mini 2
To share my experience using smart bracelet
Pros: Easy to setup, lightweight, long battery charge (I have turned off the vibrating notifications), great price, very nice user interface. I have found this to be accurate on calorie counts. Sleep monitor is a very cool feature.
Cons: Getting it to sync from the App can be delayed and is not user friendly. A button on the bottom bar saying "Sync" would be nice. Friends with the more expensive Fitbit product claim that the MiFit is off upto 25% on step counts...I take that with a grain of salt as the calorie count is accurate. User interface is in the "dreaded" metric system and printed instructions are in Chinese. However the App setup is pretty easy .
Recommend: Absolutely. I have ordered 4 more bands and plan to give them out as gifts to family. Have lost 5 pounds in one month through a moderate increase in physical activity and tracking food using MyFitnessTracker App on iOS. It's really a simple formula folks...I wish you good luck having fun and staying fit.